The 4aH battery bundle comes with one Hyper Tough 4aH batter along with The new Hyper Tough Lithium-Ion 12V Max* Brushless 3/8-inch Impact Wrench. The Hyper Tough Brushless series provides up to 30% more power, 10x longer motor life and 30% more runtime compared to standard brushed models. This cordless impact wrench is meant for tightening and loosening nuts and bolts in tight or overhead spaces. This wrench has a max tighten torque of 305 Nm/225 ft-lbs and a max breakaway torque of 380 Nm/280 ft-lbs. Also featuring a battery indicator light, built in LED work light to prevent shadowing, and an all metal belt clip for easy transportation from job to job. Also included is: (1) 2.0 Ah lithium-ion battery, (1) 3-5 hour charger, and a 2-Year Limited Warranty. Discover the entire family of Hyper Tough 12-Volt Tools and accessories exclusively at Walmart.